﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Browser;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace CommonLibSL
{
    /// <summary>
        /// 浏览器屏幕信息类
        /// </summary>
    public class Browser
    {
        /// <summary>   
        /// During static instantiation, only the Netscape flag is checked   
        /// </summary>   
        static Browser()
        {
            _isNavigator = HtmlPage.BrowserInformation.Name.Contains("Netscape");
        }

        /// <summary>   
        /// Flag indicating Navigator/Firefox/Safari or Internet Explorer   
        /// </summary>   
        private static bool _isNavigator;

        /// <summary>   
        /// Provides quick access to the window.screen ScriptObject   
        /// </summary>   
        private static ScriptObject Screen
        {
            get
            {
                ScriptObject screen = (ScriptObject)HtmlPage.Window.GetProperty("screen");

                if (screen == null)
                {
                    throw new InvalidOperationException();
                }

                return screen;
            }
        }

        /// <summary>   
        /// Gets the window object's client width   
        /// </summary>   
        public static double ClientWidth
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("innerWidth")
                : (double)HtmlPage.Document.Body.GetProperty("clientWidth");
            }

        }

        /// <summary>   
        /// Gets the window object's client height   
        /// </summary>   
        public static double ClientHeight
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("innerHeight")
                : (double)HtmlPage.Document.Body.GetProperty("clientHeight");
            }
        }

        /// <summary>   
        /// Gets the current horizontal scrolling offset   
        /// </summary>   
        public static double ScrollLeft
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("pageXOffset")
                : (double)HtmlPage.Document.Body.GetProperty("scrollLeft");
            }
        }

        /// <summary>   
        /// Gets the current vertical scrolling offset   
        /// </summary>   
        public static double ScrollTop
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("pageYOffset")
                : (double)HtmlPage.Document.Body.GetProperty("scrollHeight");
            }
        }

        /// <summary>   
        /// Gets the width of the entire display   
        /// </summary>   
        public static double ScreenWidth
        {
            get
            {
                return (double)Screen.GetProperty("width");
            }
        }

        /// <summary>   
        /// Gets the height of the entire display   
        /// </summary>   
        public static double ScreenHeight
        {
            get
            {
                return (double)Screen.GetProperty("height");
            }
        }

        /// <summary>   
        /// Gets the width of the available screen real estate, excluding the dock   
        /// or task bar   
        /// </summary>   
        public static double AvailableScreenWidth
        {
            get
            {
                return (double)Screen.GetProperty("availWidth");
            }
        }

        /// <summary>   
        /// Gets the height of the available screen real estate, excluding the dock /// or task bar   
        /// </summary>   
        public static double AvailableScreenHeight
        {
            get
            {
                return (double)Screen.GetProperty("availHeight");
            }
        }

        /// <summary>   
        /// Gets the absolute left pixel position of the window in display coordinates   
        /// </summary>   
        public static double ScreenPositionLeft
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("screenX")
                : (double)HtmlPage.Window.GetProperty("screenLeft");
            }
        }

        /// <summary>   
        /// Gets the absolute top pixel position of the window in display coordinates   
        /// </summary>   
        public static double ScreenPositionTop
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("screenY")
                : (double)HtmlPage.Window.GetProperty("screenTop");
            }
        }
    }

}
